Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8e38023010b2c7…

MALICIOUS

PDF

43.9 KB Created: 2021-06-03 07:57:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-06
MD5: 1f298e3713fbde7d803fdb1827767e53 SHA-1: 506abb2f2e63ba6f893a99cda04cfe32645e48cc SHA-256: aa8e38023010b2c76418c46c6e0922b7c313429c7cb5d36d384775d41f213799
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.online/app/431946152/hacking-apps-for-roblox-game-hack In PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ee9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EE9 24940 bytes
SHA-256: fdb41d7e7f83c66e148dcb69d6ff09ad8be87f2c9fa6fd252c2cb165622a68f9
font_01_sfnt_off000086ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86CE 18932 bytes
SHA-256: a12a900017875743d46ad83be25c63e25fa00e3014bd6d438c4b8f248ab77b0b

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